Astronomy and Astrophysics – Astronomy
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975mnras.171..311b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 171, May 1975, p. 311-328.
Astronomy and Astrophysics
Astronomy
94
Binary Stars, Dynamic Stability, Mass Transfer, Astronomical Models, Dwarf Stars, Equations Of Motion, Mathematical Models, Novae, Photosphere, Radiative Transfer, Roche Limit, Stellar Envelopes, Thermodynamic Equilibrium
Scientific paper
A hydrodynamic scheme is presented by means of which the dynamical behavior of stars transferring mass in semidetached binary systems may be investigated. Cool stellar envelopes are found to be dynamically unstable when in contact with the Roche lobe, but only so long as the recombination energy is sufficient to overcome the gravitational potential change to the surface. Such unstable states are followed by phases in which the photosphere shrinks inside the Roche lobe, readjusting to thermal equilibrium. The quasi-periodic mass transfer that results is suggested as being responsible for dwarf nova eruptions, and may be of importance in X-ray sources, Algol systems, and binary symbiotic variables.
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